This mock test gives you tough NEET-level questions. You get Physics, Chemistry and Biology in one set. Use this test to improve accuracy and exam timing. Follow each question carefully and mark the correct option.
NEET 2025 Free Mock Test, Tough Questions
Biology
1. Which event happens first during non-cyclic photophosphorylation in chloroplasts?
a. P680 gets excited
b. Photolysis of water
c. Electron moves to plastoquinone
d. H⁺ moves into lumen
Answer, b
2. Which hormone mainly triggers the final maturation of Graafian follicle before ovulation?
a. LH
b. FSH
c. Estrogen
d. GnRH
Answer, a
3. Which structure forms the major barrier for selective reabsorption in the nephron?
a. Basement membrane
b. Podocytes
c. Endothelium
d. Bowman’s capsule
Answer, b
4. Which enzyme begins protein digestion inside the stomach?
a. Pepsin
b. Trypsin
c. Chymotrypsin
d. Rennin
Answer, a
5. Which process increases genetic variation in meiosis?
a. Crossing over
b. Cytokinesis
c. Chromatin condensation
d. Synapsis
Answer, a
6. What is the main cause of resting membrane potential in neurons?
a. K⁺ leakage
b. Na⁺ channels
c. Cl⁻ pumps
d. Ca²⁺ transport
Answer, a
7. Which antibody appears first after primary exposure to an antigen?
a. IgM
b. IgG
c. IgA
d. IgE
Answer, a
8. Which organelle plays the main role in β-oxidation of fatty acids?
a. Mitochondria
b. Ribosomes
c. Chloroplast
d. Golgi
Answer, a
9. Which biome has the highest net primary productivity per unit area?
a. Tropical rainforest
b. Desert
c. Taiga
d. Tundra
Answer, a
10. Which trait in pea plants is monohybrid dominant in Mendel’s experiments?
a. Tall plant height
b. Green pod color
c. Axial flower position
d. Round seed shape
Answer, a
Chemistry
11. Which factor increases the rate of SN1 reaction the most?
a. Stability of carbocation
b. Strong nucleophile
c. Low dielectric constant
d. Primary substrate
Answer, a
12. Which pair shows maximum hydrogen bonding?
a. HF
b. HCl
c. HBr
d. HI
Answer, a
13. What is the hybridisation of carbon in allene (C₃H₄)?
a. sp and sp²
b. sp only
c. sp² only
d. sp³
Answer, a
14. Which compound forms a violet-colored complex with neutral ferric chloride solution?
a. Phenol
b. Ethanol
c. Methanal
d. Chloroform
Answer, a
15. Which metal has the highest electrical conductivity?
a. Silver
b. Copper
c. Aluminium
d. Gold
Answer, a
16. Which gas shows maximum deviation from ideal behaviour at high pressure?
a. NH₃
b. CO₂
c. H₂
d. He
Answer, a
17. In the reaction quotient Q, when will the reaction proceed toward products?
a. Q < K
b. Q = K
c. Q > K
d. K = 0
Answer, a
18. Which compound shows geometrical isomerism?
a. 2-butene
b. 2-methylpropane
c. Ethane
d. Propane
Answer, a
19. Which element has the highest first ionization enthalpy?
a. Helium
b. Neon
c. Fluorine
d. Argon
Answer, a
20. Which reaction produces a racemic mixture?
a. SN1 substitution
b. SN2 substitution
c. E2 elimination
d. Free radical substitution
Answer, a
Physics
21. Which quantity remains conserved during inelastic collisions?
a. Momentum
b. Kinetic energy
c. Potential energy
d. Angular velocity
Answer, a
22. A body of mass m moves in a circular path with constant speed. Which force is responsible for direction change?
a. Centripetal force
b. Gravitational force
c. Torque
d. Impulse
Answer, a
23. Which EM wave has the shortest wavelength?
a. Gamma rays
b. X rays
c. UV
d. Radio
Answer, a
24. What happens to the range of a projectile when angle changes from 30° to 60°?
a. Range remains same
b. Range doubles
c. Range halves
d. Range becomes zero
Answer, a
25. A transformer works on which principle?
a. Mutual induction
b. Self-induction
c. Fleming’s law
d. Joule’s law
Answer, a
26. Which quantity is always zero for SHM at mean position?
a. Acceleration
b. Velocity
c. Kinetic energy
d. Frequency
Answer, a
27. What happens to resistance of a conductor when temperature increases?
a. Increases
b. Decreases
c. Becomes zero
d. No change
Answer, a
28. Which lens has negative focal length?
a. Concave lens
b. Convex lens
c. Cylindrical lens
d. Plano-convex
Answer, a
29. Which physical quantity does not change during simple pendulum oscillation?
a. Total energy
b. Potential energy
c. Kinetic energy
d. Velocity
Answer, a
30. Escape velocity depends on which factor?
a. Mass of planet
b. Radius of planet
c. Both mass and radius
d. Density only
Answer, c
Biology Advanced
31. Which evolutionary mechanism increases allelic frequency by chance?
a. Genetic drift
b. Migration
c. Natural selection
d. Mutation
Answer, a
32. Which step in transcription needs RNA polymerase binding?
a. Initiation
b. Elongation
c. Termination
d. Proofreading
Answer, a
33. Which molecule helps stabilize DNA double helix structure?
a. Hydrogen bonds
b. Disulfide bonds
c. Ionic bonds
d. Peptide bonds
Answer, a
34. Which organ releases secretin during digestion?
a. Duodenum
b. Jejunum
c. Liver
d. Colon
Answer, a
35. Which immune cells destroy virus-infected cells?
a. Cytotoxic T cells
b. B cells
c. Macrophages
d. Neutrophils
Answer, a
Chemistry Advanced
36. Which complex has maximum stability according to Chelate effect?
a. EDTA complexes
b. Ammonia complexes
c. Cyanide complexes
d. Water complexes
Answer, a
37. Which orbital does not participate in bonding in BF₃?
a. p-orbital
b. s-orbital
c. d-orbital
d. Hybrid orbital
Answer, c
38. Which reaction mechanism forms a carbocation intermediate?
a. SN1
b. SN2
c. E2
d. Aromatic substitution
Answer, a
39. Which type of crystal defect decreases density?
a. Schottky defect
b. Frenkel defect
c. Interstitial defect
d. Substitution defect
Answer, a
40. Which factor increases solubility of gases in liquids?
a. High pressure
b. High temperature
c. Low pressure
d. Strong radiation
Answer, a
Physics Advanced
41. Which force provides stability to a satellite in circular orbit?
a. Gravitation
b. Centrifugal
c. Magnetic
d. Electric
Answer, a
42. What happens to frequency of an LC oscillator when inductance increases?
a. Frequency decreases
b. Frequency increases
c. Frequency becomes zero
d. No change
Answer, a
43. Which law explains the shift in wavelength in Doppler effect?
a. Wave theory
b. Principle of superposition
c. Conservation of energy
d. Relative motion
Answer, d
44. What is the unit of angular momentum?
a. kg m²/s
b. N s
c. J m
d. J s
Answer, a
45. A photon’s energy depends on which factor?
a. Frequency
b. Amplitude
c. Intensity
d. Phase
Answer, a
Mixed High Difficulty
46. Which enzyme is rate limiting in glycolysis?
a. PFK-1
b. Hexokinase
c. Aldolase
d. Enolase
Answer, a
47. Which species shows sp³d hybridization?
a. PCl₅
b. BF₃
c. SO₂
d. CO₂
Answer, a
48. Which physical law explains the rise of liquid in a capillary tube?
a. Surface tension
b. Bernoulli law
c. Pascal law
d. Gauss law
Answer, a
49. Which structure controls respiration rhythm in the brain?
a. Medulla
b. Cerebellum
c. Thalamus
d. Hypothalamus
Answer, a
50. Which pairing has the strongest bond?
a. N≡N
b. O=O
c. H–H
d. C=C
Answer, a
This NEET 2025 mock test gives you tough questions from all subjects. Revise these topics and repeat the test to check improvement. Use this set to strengthen concepts and boost exam performance.
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